Inverters coupled with batteries serve the purpose of providing predetermined amounts of electricity continuously or in intervals for long periods. Inverters and batteries were initially used in power stations and the automotive industry for providing backup power.
With the increase in the frequency of power cuts, inverters and batteries found themselves being employed as the solutions to the power cuts in homes and offices.
Inverter batteries can be a tricky item to purchase especially if you are doing so for the first time and do not have any idea what to look for. Hence, there are a few things you must understand before buying the best inverter battery in India. This would help you in selecting the right inverter battery to meet your demands.

1. Power Requirement
One of the first things you should do before deciding which of the best inverter battery in India to purchase is to gauge your power requirement. In other words, you need to select the appliances that you want the inverter battery to cover, along with the power (in Watts) of each. If you purchase a battery while ignoring this step, your battery will not perform to the best of its ability. Furthermore, it may also result in your appliances being damaged. So, if you want to run two ceiling fans, one CFL bulb, two tube lights, and a television, then your power requirement would look something like this:
| Appliance | Watts | Quantity | Total Power |
| Ceiling Fan | 75W | 2 | 150W |
| CFL Bulb | 25W | 1 | 25W |
| Tube Light | 45W | 2 | 90W |
| Television | 150W | 1 | 150W |
| Total Power Requirement | 415W | ||
The power requirement will also help you in calculating the battery capacity that will be suitable for you. The capacity requirement also depends upon the duration for which you want the inverter to run. Your capacity requirement can be easily calculated with the help of a formula.
Battery capacity= (power requirements in watts * backup-time * aging factor) / (battery voltage*battery efficiency*inverter efficiency)
Constant variables (These numbers are constant for every case)
Inverter aging factor = 1.25
Battery efficiency = 0.8
Inverter efficiency = 0.8
So, if your power requirement is 415W, backup duration is 4 hours, and battery voltage is 12V, you would require a battery capacity of at least 270 Ah.
2. Compatibility Aspect
Before you purchase the best inverter battery in India, you must check if the battery selected is compatible with your inverter. If you purchase it and they are not compatible, you would have spent a lot of money on something that essentially would be of no use to you. In the case where you are buying an inverter for the first time too, you should opt for an inverter and battery combo. This will ensure compatibility and you will save money as well.
3. Type of Battery
Inverter batteries can be categorised into flat plate, gel, and tubular batteries. Each of these three batteries has different specifications and features in terms of pricing, efficiency, charging duration, lifespan, maintenance, and environmental friendliness. Thus, you should understand them in-depth, so you can choose the one that meets your unique requirements.
4. Warranty Specifications
Another key aspect to look for when deciding which best inverter battery in India to buy is the warranty specification. When it comes to the best inverter battery in India, reliable brands like Luminous provide customers with a combination of regular (flat) warranty and pro-rata warranty. Pro-rata warranty refers to a situation wherein a battery is replaced at a cost that depends on the age of the battery at that current time. In simpler terms, pro-rata refers to proportionate allocation or partial warranty, since only a percentage of the initial amount is covered.
Carefully Examine Critical Specifications Before Purchasing the Best Inverter Battery in India
Comprehending these critical aspects will give you a deeper insight into the world of inverter batteries, which will help you in selecting the best branded battery for your requirements. Opting for branded batteries are a must since they provide greater reliability, better quality, and require lesser maintenance.